Orion L77-17, Инструкция по эксплуатации

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There is also the possibility of problems with external limit switches, pulse pickups
sensor, or the Hall effect device. This should be apparent by problems with particular
functions, i.e.: failure to respond to limits. Operating the devices manually and
measuring the resistance of the switches or the output of the pulse pickup sensor could
assist in diagnosis.
The microprocessor PCB is equipped with six monitoring LEDs, which should assist in
verifying whether signals from external devices are being received and detected by the
755 system (Fig 2.).
These are (from the top):
•
Pulse pickup (turntable momentary position sensor) – an inductive sensor
beneath the turntable detects the passage of drive gear teeth as a means of
monitoring turntable position. Each tooth produces a pulse input to the
microprocessor. An LED flashes with each pulse. The device connects to the 3
position green plug-in terminal strip (TB3) on the left side of the MCIA. Proper
input can be observed as rapid flashing of the LED
•
Carriage run – light turns off when the carriage drive is energized.
•
Carriage down limit – light turns off when the down limit switch is operated
•
Carriage up Limit – light turns off when the up limit switch is operated
•
Turntable run – light turns on when the turntable drive is energized
The hall effect device calibration is described on page 3. If there is no input voltage
measure from the hall effect device while moving the multistretch dancer arm, replace
the hall effect device to see if the problem is related to the sensor. This can be
monitored at terminals 1 (signal) and 23 (common) of the terminal interface (TB 4 -
green plug-in terminals at bottom left of MCIA - see Fig. 3). The supply 24VDC can be
observed at terminal 24.
SECTION 10
Spares Parts
The three principal sub-assemblies to control the operation. To ensure continuity of
operation, spares parts should be obtainable:
•
The Keyboard display (type 755.1)
•
The Microprocessor Board (type 755.2)
•
The Motor Control Interface Assembly which comprises:
•
Mother Board Assembly (type 755.3)
•
Multistretch Drive (type 755.4)
•
Carriage Drive (type 755.5)
•
Turntable Drive (type 755.6)
•
Fuse Buss AGC 8
•
Fuse Buss AGC 1/2
•
Relay P&B K10P-11A15-120
•
Power switch knob LFS 2-N-6-175
•
Power switch body LE 2-20-1752
•
Hall effect transducer IB05T
•
Top & bottom limit switch ZCK-J404H7
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